In which state do you need to pay more to play video games, Hawaii or NY?

Grade level: 4th – 5th grades

Skills: Bar graphs

Related environmental issues: Energy

The price of electricity varies widely from area to area. This is because the type and the price of energy sources each area uses to generate electricity are different. The bar graph below shows the average electricity price for playing video games for 5 hours in seven states in November 2019.

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  1. 1.In which state do you need to pay more than 30 cents to play video games for 5 hours?
  2. It costs about _____ cents more to play video games for 5 hours in Alaska than in Indiana.
  3. Among the seven states, which is the third most expensive state to play video games?


Source: U.S. Energy Information Administration, 2020. Electric Power Monthly

Note: It is using per kW electricity price

Answer keys





The 225 Math Quizzes That Will Make You An Environmental Expert (2019) is available from  (paperback)

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What U.S. company uses that largest amount of solar power?

Grade level: 4th-5th grades

Skills: Comparing numbers / Subtraction (Decimal numbers)

Related environmental issues: Renewable Energy 

Many large companies in the United States have installed solar panels to use renewable energy to meet their energy demand and to become more environmentally sustainable.

The table below shows top 5 companies that use the largest amount of solar power in the United States.

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1. Arrange companies from greatest to least.

2. How much more or less solar power does Target use than Walmart?

3. How much more or less solar power does Amazon use than Apple?

Source) SEIA (Solar Energy Industries Association), 2019. 2018 Solar Means Business Report


Answer keys

1. Apple, Amazon, Target, Walmart, Switch

2. 242.4 – 208.9 = 33.5        33,500 (kilowatts) more solar power

3. 393.3 – 329.8 = 63.5        63,500 (kilowatts) less solar power